521345156244 has 48 divisors (see below), whose sum is σ = 1405122780096. Its totient is φ = 148690240000.

The previous prime is 521345156243. The next prime is 521345156281. The reversal of 521345156244 is 442651543125.

It is a junction number, because it is equal to n+sod(n) for n = 521345156196 and 521345156205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521345156243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116162007 + ... + 116166494.

It is an arithmetic number, because the mean of its divisors is an integer number (29273391252).

Almost surely, 2^521345156244 is an apocalyptic number.

It is an amenable number.

521345156244 is an abundant number, since it is smaller than the sum of its proper divisors (883777623852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521345156244 is a wasteful number, since it uses less digits than its factorization.

521345156244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232328536 (or 232328534 counting only the distinct ones).

The product of its digits is 576000, while the sum is 42.

Adding to 521345156244 its reverse (442651543125), we get a palindrome (963996699369).

It can be divided in two parts, 52134 and 5156244, that added together give a triangular number (5208378 = T₃₂₂₇).

The spelling of 521345156244 in words is "five hundred twenty-one billion, three hundred forty-five million, one hundred fifty-six thousand, two hundred forty-four".